The factory Hellcat blower is a 2.4 liter twin screw unit. A very good blower but if you want more power a bigger blower isn't a bad idea. What is interesting to note here is Magnuson's swap kit replaces the twin screw with a TVS2650 unit.

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It is not a twin screw but a roots unit although a much more advanced design than traditional roots blowers.

The extra .25 liters is nice but it is the efficiency gain that making the real difference.

These were the claims Magnuson made last year when they announced the blower swap kit:

  • True reliable operating range to 20,000 RPM
  • 33% higher flow than TVS2300
  • 10% higher flow than a 2.9 screw
  • 14% higher adiabatic efficiency at 14k rpm and 2.0 pressure ratio compared to screw 2.9 at the same flow
  • 75F lower discharge temperature at 14k rpm and 2.0 pressure ratio compared to screw 2.9 at the same flow
  • 26 HP less input power required at 14k rpm and 2.0 pressure ration compared to screw 2.9 at the same flow

Well, they weren't lying as they hit 946 horsepower to the wheels on a stock internal Hellcat at only 5800 rpm while running out of fuel.

Some bigger injectors and... easy 1000+ rwhp? It sure looks like it.